| 摘要 |
A developing apparatus for an image forming apparatus includes a magnetic sealing member having an arcuate surface and having a magnetic property, and which is opposed to an outer surface of a developing roller with a gap therebetween and a projected surface having a magnetic property projected from an upstream end of the arcuate surface toward upstream with respect to a peripheral moving direction of the developing roller, and which is more remote from an outer surface of the developing roller than the arcuate surface; and a sheet for preventing the magnetic developer from leaking between the developing device frame and the developing roller. The sheet is mounted to an upstream end of a developing device frame with respect to the moving direction and contacted to the developing roller so as to cover at least a part of the projected surface. |
